use std::{
borrow::Cow,
env::{self, VarError},
fmt,
};
use crate::utils;
// adapted from target/arch.rs from platforms crate
/// Target CPU architecture
#[derive(Clone, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
#[non_exhaustive]
pub enum Arch<'a> {
/// `aarch64`: ARMv8 64-bit architecture
AARCH64,
/// `arm`: 32-bit ARM architecture
ARM,
/// `asm`: asm.js output
ASMJS,
/// `mips`: 32-bit MIPS CPU architecture
MIPS,
/// `mips64`: 32-bit MIPS CPU architecture
MIPS64,
/// `msp430`: 16-bit MSP430 microcontrollers
MSP430,
/// `powerpc`: 32-bit POWERPC platform
POWERPC,
/// `powerpc64`: 64-bit POWERPC platform
POWERPC64,
/// `riscv`: RISC-V CPU architecture
RISCV,
/// `s390x`: 64-bit IBM z/Architecture
S390X,
/// `sparc`: 32-bit SPARC CPU architecture
SPARC,
/// `sparc64`: 64-bit SPARC CPU architecture
SPARC64,
/// `thumbv6`: 16-bit ARM CPU architecture subset
THUMBV6,
/// `thumbv7`: 16-bit ARM CPU architecture subset
THUMBV7,
/// `wasm32`: Web Assembly (32-bit)
WASM32,
/// `x86`: Generic x86 CPU architecture
X86,
/// `x86_64`: "AMD64" CPU architecture
X86_64,
/// Unknown CPU architecture
Other(Cow<'a, str>),
}
impl<'a> Arch<'a> {
/// String representing this target architecture which matches `#[cfg(target_arch)]`.
#[must_use]
pub fn as_str(&self) -> &str {
match self {
Arch::AARCH64 => "aarch64",
Arch::ARM => "arm",
Arch::ASMJS => "asmjs",
Arch::MIPS => "mips",
Arch::MIPS64 => "mips64",
Arch::MSP430 => "msp430",
Arch::POWERPC => "powerpc",
Arch::POWERPC64 => "powerpc64",
Arch::RISCV => "riscv",
Arch::S390X => "s390x",
Arch::SPARC => "sparc",
Arch::SPARC64 => "sparc64",
Arch::THUMBV6 => "thumbv6",
Arch::THUMBV7 => "thumbv7",
Arch::WASM32 => "wasm32",
Arch::X86 => "x86",
Arch::X86_64 => "x86_64",
Arch::Other(s) => s,
}
}
/// Tries to parse the given string as an [`Arch`] falling back to [`Arch::Other`] for unknown values.
pub fn from_str(arch_name: impl Into<Cow<'a, str>>) -> Self {
let arch_name = utils::into_ascii_lowercase(arch_name.into());
match arch_name.as_ref() {
"aarch64" => Arch::AARCH64,
"arm" => Arch::ARM,
"asmjs" => Arch::ASMJS,
"mips" => Arch::MIPS,
"mips64" => Arch::MIPS64,
"msp430" => Arch::MSP430,
"powerpc" => Arch::POWERPC,
"powerpc64" => Arch::POWERPC64,
"riscv" => Arch::RISCV,
"s390x" => Arch::S390X,
"sparc" => Arch::SPARC,
"sparc64" => Arch::SPARC64,
"thumbv6" => Arch::THUMBV6,
"thumbv7" => Arch::THUMBV7,
"wasm32" => Arch::WASM32,
"x86" => Arch::X86,
"x86_64" => Arch::X86_64,
_ => Arch::Other(arch_name),
}
}
/// Gets the current target [`Arch`].
pub fn target() -> Result<Self, VarError> {
env::var("CARGO_CFG_TARGET_ARCH").map(Self::from_str)
}
}
impl<'a> fmt::Display for Arch<'a> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(self.as_str())
}
}